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180 lines
4.9 KiB
C
180 lines
4.9 KiB
C
/* Measure memcmp functions.
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Copyright (C) 2013-2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#define TEST_MAIN
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#ifdef TEST_MEMCMPEQ
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# define TEST_NAME "__memcmpeq"
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#elif defined WIDE
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# define TEST_NAME "wmemcmp"
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#else
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# define TEST_NAME "memcmp"
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#endif
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#include "bench-string.h"
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#include "json-lib.h"
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typedef int (*proto_t) (const CHAR *, const CHAR *, size_t);
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IMPL (MEMCMP, 1)
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static void
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do_one_test (json_ctx_t *json_ctx, impl_t *impl, const CHAR *s1,
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const CHAR *s2, size_t len)
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{
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size_t i, iters = INNER_LOOP_ITERS_LARGE;
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timing_t start, stop, cur;
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TIMING_NOW (start);
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for (i = 0; i < iters; ++i)
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{
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CALL (impl, s1, s2, len);
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}
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TIMING_NOW (stop);
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TIMING_DIFF (cur, start, stop);
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json_element_double (json_ctx, (double) cur / (double) iters);
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}
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static void
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do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t len,
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int exp_result)
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{
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size_t i;
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CHAR *s1, *s2;
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align1 &= (4096 - CHARBYTES);
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if (align1 + (len + 1) * CHARBYTES >= page_size)
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return;
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align2 &= (4096 - CHARBYTES);
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if (align2 + (len + 1) * CHARBYTES >= page_size)
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return;
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json_element_object_begin (json_ctx);
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json_attr_uint (json_ctx, "length", (double) len);
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json_attr_uint (json_ctx, "align1", (double) align1);
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json_attr_uint (json_ctx, "align2", (double) align2);
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json_attr_uint (json_ctx, "result", (double) exp_result);
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json_array_begin (json_ctx, "timings");
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s1 = (CHAR *)(buf1 + align1);
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s2 = (CHAR *)(buf2 + align2);
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for (i = 0; i < len; i++)
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s1[i] = s2[i] = 1 + (23 << ((CHARBYTES - 1) * 8)) * i % MAX_CHAR;
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if (len)
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{
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s1[len] = align1;
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s2[len] = align2;
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s2[len - 1] -= exp_result;
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}
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FOR_EACH_IMPL (impl, 0)
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{
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do_one_test (json_ctx, impl, s1, s2, len);
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}
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json_array_end (json_ctx);
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json_element_object_end (json_ctx);
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}
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int
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test_main (void)
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{
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json_ctx_t json_ctx;
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size_t i;
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test_init ();
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json_init (&json_ctx, 0, stdout);
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json_document_begin (&json_ctx);
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json_attr_string (&json_ctx, "timing_type", TIMING_TYPE);
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json_attr_object_begin (&json_ctx, "functions");
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json_attr_object_begin (&json_ctx, TEST_NAME);
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json_attr_string (&json_ctx, "bench-variant", "default");
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json_array_begin (&json_ctx, "ifuncs");
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FOR_EACH_IMPL (impl, 0)
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json_element_string (&json_ctx, impl->name);
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json_array_end (&json_ctx);
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json_array_begin (&json_ctx, "results");
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for (i = 0; i < 32; ++i)
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{
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do_test (&json_ctx, i * CHARBYTES, i * CHARBYTES, i, 0);
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do_test (&json_ctx, i * CHARBYTES, i * CHARBYTES, i, 1);
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do_test (&json_ctx, i * CHARBYTES, i * CHARBYTES, i, -1);
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}
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for (i = 0; i < 32; ++i)
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{
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do_test (&json_ctx, 0, 0, i, 0);
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do_test (&json_ctx, 0, 0, i, 1);
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do_test (&json_ctx, 0, 0, i, -1);
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do_test (&json_ctx, 4096 - i, 0, i, 0);
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do_test (&json_ctx, 4096 - i, 0, i, 1);
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do_test (&json_ctx, 4096 - i, 0, i, -1);
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}
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for (i = 33; i < 385; i += 32)
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{
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do_test (&json_ctx, 0, 0, i, 0);
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do_test (&json_ctx, 0, 0, i, 1);
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do_test (&json_ctx, 0, 0, i, -1);
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do_test (&json_ctx, i, 0, i, 0);
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do_test (&json_ctx, 0, i, i, 1);
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do_test (&json_ctx, i, i, i, -1);
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}
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for (i = 1; i < 10; ++i)
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{
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do_test (&json_ctx, 0, 0, 2 << i, 0);
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do_test (&json_ctx, 0, 0, 2 << i, 1);
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do_test (&json_ctx, 0, 0, 2 << i, -1);
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do_test (&json_ctx, (8 - i) * CHARBYTES, (2 * i) * CHARBYTES, 16 << i, 0);
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do_test (&json_ctx, 0, 0, 16 << i, 0);
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do_test (&json_ctx, 0, 0, 16 << i, 1);
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do_test (&json_ctx, 0, 0, 16 << i, -1);
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do_test (&json_ctx, i, 0, 2 << i, 0);
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do_test (&json_ctx, 0, i, 2 << i, 1);
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do_test (&json_ctx, i, i, 2 << i, -1);
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do_test (&json_ctx, i, 0, 16 << i, 0);
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do_test (&json_ctx, 0, i, 16 << i, 1);
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do_test (&json_ctx, i, i, 16 << i, -1);
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}
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for (i = 1; i < 10; ++i)
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{
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do_test (&json_ctx, i * CHARBYTES, 2 * (i * CHARBYTES), 8 << i, 0);
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do_test (&json_ctx, i * CHARBYTES, 2 * (i * CHARBYTES), 8 << i, 1);
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do_test (&json_ctx, i * CHARBYTES, 2 * (i * CHARBYTES), 8 << i, -1);
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}
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json_array_end (&json_ctx);
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json_attr_object_end (&json_ctx);
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json_attr_object_end (&json_ctx);
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json_document_end (&json_ctx);
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return ret;
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}
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#include <support/test-driver.c>
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